/Engine/Source/Developer/AssetTools/Public/AssetViewUtils.h
Returns true if the specified path is available for object creation
namespace AssetViewUtils { bool AssetViewUtils::IsValidObjectPathForCreate ( const [FString](API\Runtime\Core\Containers\FString) & ObjectPath, [FText](API\Runtime\Core\Internationalization\FText) & OutErrorMessage, bool bAllowExistingAsset ) }